Valve special for black water of high-pressure gasification furnace

Abstract

The utility model relates to a special valve for black water of a high-pressure gasification furnace, which comprises a valve body with a liquid inlet on one side, a liquid outlet on the bottom and an inner cavity communicated with the liquid inlet and the liquid outlet; the valve seat is formed at the position of the inner cavity and the liquid outlet; the valve rod is vertically arranged in the valve body; the valve element is arranged at the end, located in the valve body, of the valve rod. The executing mechanism is arranged above the valve body and is suitable for driving the valve rod to enable the valve element to abut against the valve seat; the inner wall of the valve seat is an arc-shaped sealing surface, and the top is free of a plane; the inner wall of the valve seat is located on the arc-shaped sealing face, the top of the valve seat is free of a plane, black water can naturally fall down from the valve seat and cannot stay in the valve body, the valve seat cannot be corroded, and the service life of the valve body is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a special valve for black water of a high-pressure gasifier. Background Art

[0002] High-pressure gasifier black water is a by-product of the production process of the scrubber and gasifier during the coal-water slurry gasification process; black water is a mixture of liquid and solid phases;

[0003] In liquid phase flow, the liquid contains a lot of Ca 2+ Mg 2+ 、Cl-、S 2- 、CO3 2- NH4 + , H2S and other highly corrosive ions; when the black water valve is closed, part of the liquid phase will remain in the valve body, causing erosion on the inner wall and parts of the valve body;

[0004] In summary, how to prevent the liquid phase flow from being retained in the valve body has become an urgent problem that researchers in this field need to solve. Utility Model Content

[0005] The technical problem to be solved by the utility model is: how to prevent the liquid phase flow from being retained in the valve body;

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] The utility model is a special valve for black water of a high-pressure gasifier, comprising: a valve body, one side of which is provided with a liquid inlet, a bottom of which is provided with a liquid outlet, and an inner cavity communicating with the liquid inlet and the liquid outlet; a valve seat, the inner cavity and the liquid outlet forming the valve seat; a valve stem, which is vertically arranged in the valve body; a valve core, one end of the valve stem located in the valve body is provided with the valve core; an actuator, which is arranged above the valve body and is suitable for driving the valve stem to make the valve core abut against the valve seat; the inner wall of the valve seat is an arc-shaped sealing surface, and the top of the valve seat has no flat surface;

[0008] In conventional solutions, there is a flat surface on the top of the valve seat, and the liquid flow will be retained on this plane, corroding the valve seat; in this solution, the inner wall of the valve seat is located on the arc-shaped sealing surface, and there is no flat surface on the top. Black water will naturally fall from the valve seat and will not be retained in the valve body, nor will it corrode the valve seat, thereby extending the service life of the valve body.

[0009] In order to avoid corrosion to the valve core, the utility model adopts the top of the valve core to be a conical surface;

[0010] When black water is on the valve core, it will naturally fall along the conical surface and will not stay on the valve core, nor will it corrode the valve core, thus extending the service life of the valve body.

[0011] In conventional valves, the solid phase flow will impact the valve stem in a vertical state, greatly reducing the service life of the valve stem. In order to solve the above problem, the utility model adopts a guide member at the top connection between the valve stem and the valve body; the bottom of the guide member extends downward into the valve body, and its outer wall has a guide impact surface;

[0012] The guide member can prevent the solid phase flow from directly hitting the valve stem. In addition, the outer wall of the guide member has an impact surface inclined downward. When the solid phase flow hits the impact surface, it will guide the flow of the medium and reduce the impact on the guide member and the valve stem.

[0013] In order to increase the sealing performance between the valve core and the valve seat, the utility model adopts an annular groove at the bottom of the valve core; a sealing member is arranged in the annular groove and seals against the valve seat;

[0014] A seal is used between the valve core and the valve seat for line sealing, which improves the sealing performance between the valve core and the valve seat.

[0015] In order to illustrate the specific structure of the actuator, the actuator adopted by the utility model includes: a housing, which is arranged above the valve body; a piston rod, which passes through the housing and is connected to the valve rod at the bottom; a piston, which is fixed to the piston rod and is sealed with the housing; an upper spring seat, which is fixed to the top of the housing; a lower spring seat, which is fixed to the piston; a spring, which is arranged between the upper spring seat and the lower spring seat; an air inlet, which is opened at the bottom of the housing;

[0016] Air is introduced into the shell through the air inlet hole, the piston rod moves upward under the drive of the piston, and the spring is compressed. At this time, the valve core is separated from the valve seat and the valve is in an open state; when the valve needs to be closed, gas is not introduced into the air inlet hole, the spring is reset, and the valve core and the valve seat are sealed against each other.

[0017] Beneficial effects of the utility model: the utility model is a special valve for black water of a high-pressure gasifier. The inner wall of the valve seat is located on the arc-shaped sealing surface, and there is no flat surface on the top. Black water will naturally fall from the valve seat and will not be retained in the valve body, and will not corrode the valve seat, thereby extending the service life of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a cross-sectional view of the utility model;

[0020] Figure 2 It is a schematic diagram of medium flow direction;

[0021] In the figure: 1-valve body, 2-liquid inlet, 3-liquid outlet, 4-inner cavity, 5-valve seat, 6-valve stem, 7-valve core, 8-actuator, 9-arc sealing surface, 10-conical surface, 11-guide, 12-guide impact surface, 13-seal, 14-housing, 15-piston rod, 16-piston, 17-upper spring seat, 18-lower spring seat, 19-spring, 20-inlet hole. DETAILED DESCRIPTION

[0022] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0023] like Figure 1-2 As shown, the utility model is a special valve for black water of a high-pressure gasifier, comprising: a valve body 1, one side of which has a liquid inlet 2, a bottom of which has a liquid outlet 3, and an inner cavity 4 communicating with the liquid inlet 2 and the liquid outlet 3; a valve seat 5, the inner cavity 5 and the liquid outlet 3 form the valve seat 5; a valve stem 6, which is vertically arranged in the valve body 1; a valve core 7, one end of the valve stem 6 located in the valve body 1 is provided with the valve core 7; an actuator 8, which is arranged above the valve body 1 and is suitable for driving the valve stem 6 downward to abut the valve core 7 against the valve seat 5; the inner wall of the valve seat 5 is an arc-shaped sealing surface 9, and the top thereof has no flat surface;

[0024] In conventional solutions, there is a flat surface on the top of the valve seat, and the liquid flow will be retained on this plane, corroding the valve seat; in this solution, the inner wall of the valve seat is located on the arc-shaped sealing surface, and there is no flat surface on the top. Black water will naturally fall from the valve seat and will not be retained in the valve body, nor will it corrode the valve seat, thereby extending the service life of the valve body.

[0025] like Figure 1-2 As shown, in order to avoid corrosion to the valve core, the utility model adopts the top of the valve core 7 to be a conical surface 10;

[0026] When black water is on the valve core, it will naturally fall along the conical surface and will not stay on the valve core, nor will it corrode the valve core, thus extending the service life of the valve body.

[0027] like Figure 1-2 As shown, in a conventional valve, the solid phase flow will impact the valve stem in a vertical state, greatly reducing the service life of the valve stem. In order to solve the above problem, the utility model adopts a guide member 11 at the top connection between the valve stem 6 and the valve body 1; the bottom of the guide member 11 extends downward into the valve body 1, and its outer wall has a guide impact surface 12;

[0028] The guide member can prevent the solid phase flow from directly hitting the valve stem. In addition, the outer wall of the guide member has an impact surface inclined downward. When the solid phase flow hits the impact surface, it will guide the flow of the medium and reduce the impact on the guide member and the valve stem.

[0029] like Figure 1-2 As shown, in order to increase the sealing performance between the valve core and the valve seat, the utility model adopts an annular groove at the bottom of the valve core 10; a sealing member 13 is arranged in the annular groove and seals against the valve seat 5;

[0030] A seal is used between the valve core and the valve seat for line sealing, which improves the sealing performance between the valve core and the valve seat.

[0031] like Figure 1 As shown, in order to illustrate the specific structure of the actuator, the actuator 8 adopted by the utility model includes: a housing 14, which is arranged above the valve body 1; a piston rod 15, which passes through the housing 14 and is connected to the valve stem 6 at the bottom; a piston 16, which is fixed on the piston rod 15 and is sealed with the housing 14; an upper spring seat 17, which is fixed on the top of the housing 1; a lower spring seat 18, which is fixed on the piston 16; a spring 19, which is arranged between the upper spring seat 17 and the lower spring seat 18; an air inlet 20, which is opened at the bottom of the housing 14;

[0032] Air is introduced into the shell through the air inlet hole, the piston rod moves upward under the drive of the piston, and the spring is compressed. At this time, the valve core is separated from the valve seat and the valve is in an open state; when the valve needs to be closed, gas is not introduced into the air inlet hole, the spring is reset, and the valve core and the valve seat are sealed against each other.

[0033] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. High-pressure gasifier black water special valve, characterized in that: include: A valve body having a liquid inlet on one side, a liquid outlet at the bottom, and an inner cavity communicating with the liquid inlet and the liquid outlet; A valve seat, formed by the inner cavity and the liquid outlet; A valve stem vertically disposed in the valve body; A valve core, wherein one end of the valve stem located within the valve body is provided with the valve core; An actuator, which is arranged above the valve body and is suitable for driving the valve stem to make the valve core abut against the valve seat; The inner wall of the valve seat is an arc-shaped sealing surface, and the top of the valve seat has no flat surface.

2. The high-pressure gasifier black water dedicated valve according to claim 1, characterized in that: The top of the valve core is a conical surface.

3. The high-pressure gasifier black water dedicated valve according to claim 1, characterized in that: A guide piece is provided at the top connection between the valve stem and the valve body; The bottom of the guide member extends downward into the valve body, and the outer wall of the guide member has a guide impact surface.

4. The high-pressure gasifier black water dedicated valve according to claim 1, characterized in that: An annular groove is provided at the bottom of the valve core; A sealing member is arranged in the annular groove and seals against the valve seat.

5. The high-pressure gasifier black water dedicated valve according to claim 1, characterized in that: The executive mechanism comprises: A housing, which is arranged above the valve body; A piston rod, which passes through the housing and has the valve stem connected to its bottom; A piston, which is fixed on the piston rod and is sealed with the housing; An upper spring seat fixed to the top of the housing; a lower spring seat fixed to the piston; A spring, which is arranged between the upper spring seat and the lower spring seat; An air inlet hole is provided at the bottom of the shell.

Images